There are different blood types: A, B, AB, and O, with each also being Rh-positive or Rh-negative. Knowing your blood type is important for safe blood transfusions and organ transplants. Type ...

Rare blood type link: Thornton says his AB-negative blood type, found in less than 1% of people, contributes to his food allergies and digestive issues. Strict food restrictions: He avoids dairy, ...